The hadith of the one who prays Fajr in congregation

Q: A hadith was reported from the Messenger of Allah (peace and blessings be upon him) to the effect that: whoever prays the Fajr prayer in congregation and sits remembering Allah until the sun rises, then prays two rak'ahs, that is equivalent to a complete Hajj and 'Umrah. Is this authentic?

A: There is disagreement regarding its authenticity, and the correct view is that it is a hasan (good) hadith due to the multiplicity of its chains of transmission.